turpeth, n. [NL. turpethum, fr. Per. tirbid a cathartic, turbad a purgative root. Cf. Turbith.].
The root of Ipom, a plant of Ceylon, Malabar, and Australia, formerly used in medicine as a purgative; -- sometimes called vegetable turpeth. [1913 Webster]
A heavy yellow powder, Hg3O2SO4, which consists of a basic mercuric sulphate; -- called also turpeth mineral. [1913 Webster]